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Original Research Article Effects of sowing date on sunflower (Helianthis annuus L.) yield and yield components under rainfed conditions in Blue Nile State, Sudan |
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Amin El Sir A. I.1*, Abubaker A. Abdallah1, Adlan M. Ahmed1, Ezeldeen A. Banaga1 and Omima B. Haj2 |
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1Damazin
Agricultural Research Station, P.O. Box 128 Damazin, Sudan |
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Abstract |
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A field trial was
conducted for two consecutive seasons (2014/15 and 2015/16) at
Al-Damazin Agricultural Research Station Farm, Damazin, Sudan,
located at longitude 34°22’ E, latitude 11°47’ N and altitude
470 m. The objective of this study is to determine the optimum
sowing date for sunflower under rainfed conditions in Blue Nile
State, Sudan. The experimental materials consisted of one
sunflower hybrid (Sirena cultivar) and four sowing dates
late-July (22 and 24 July), early August (1 and 3 August),
mid-August (11 and 13 August) and late August (21 and 23
August). The experiment started grown on 22.7.2014 and 24. 7.
2015 as the first sowing date with interval period of 10 days
between each sowing date to other. A randomized complete block
design with three replications was used. Data collected and
parameters measured included days to 50% flowering, days to
maturity, plant height (m), head diameter (cm), 100 – seed
weight (g), % of filled seed and seed yield ton/ha. Statistical
analysis revealed highly significant differences (P≤ 0.001and P≤
0.05) among all traits measured in both seasons. Seed yield
recorded the highest value (2.8ton/ha) in season one by the late
July (21-23) sowing date. The combine analysis for seed yield
over the two seasons revealed that the early August (1-3) sowing
date out-yielded (2.6tons/ha) the rest tested sowing dates. |
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